Applied Mechanics and Materials Vols. 341-342

Abstract: Wireless sensor network is one of the supporting technologies of the Internet of Things, composed of both communication ability and wireless sensors with limited power, WSN is responsible for sensing information and transmission of stub networks. On the basis of analyzing the reason for generating uncertain information such as information fusion and random load in wireless sensor networks, transmission model is the emphasis of research and design. Besides this, a multiple-path routing protocol with minimum transmission is put forward.

Abstract: S7-200 Series PLC supplied by SIEMENS as controller has been adopted in this system, which is based on 3D force-controlled configure software, using GPRS RTU transparent transmission function, to realize the remote monitor for the process, parameter and the operation status of the main equipment of rural domestic sewage treatment. The monitoring & indicating of sewage treatment process, the storage and the query of history memory of various monitoring data, control data and operation data, the generation of data statement and data curve, and the IE explorer remote access monitoring interface have been supported in this system.

Abstract: Due to the advantage of data fusion in deleting redundant information and extending lifetime of network, data fusion has become one of the important ways of effectively relieving the bottleneck of wireless sensor networks resources, which has been widely used in wireless sensor networks. Security mechanism of transmission encryption of network is introduced to protect the security of data transmission of network.

Abstract: This paper uses the panoramic video data obtained by the UAV as data source, constructs low-altitude Panoramic Video Monitoring System based on eye-fish lens, and provides a new monitoring method which is real-time, dynamic, continuous, extensive and measurable by making a breakthrough in some key technologies, such as, distortion correction of eye-fish, geo-location based on panoramic video and projection transformation.

Abstract: According to the existing problems in current key management strategy of wireless sensor networks, which have computation complexity, multi-memory space and inflexible management, this paper proposed a lightweight of cluster-based key management scheme for wireless sensor networks. Implementing the EBS(exclusive basis system) in the cluster heads communication, it could effectively enhance the ability of the resilience. Using Chinese remainder theorem in sensors communication, it will have less storage consumption, Lower communication and computational overhead. Under comparative analysis, it meets the needs of the WSNs key management and provides the better connectivity as well as the resilience compare to other key management schemes.

Abstract: The primary objectives of the wireless sensor network routing protocol design are balancing network energy consumption and extending the entire network lifetime. This paper analyses the effectiveness of LEACH protocol in cluster-head selection, and proposes an improved clustering algorithm. This new algorithm takes nodes residual energy and location information into account, optimizes the selection method of the threshold for electing cluster-head, improves optimal cluster-head selection strategy that is normal nodes select the optimal cluster-head based on the cost function. Simulation results show that the improved protocol is better than LEACH in balancing node energy consumption, improving the efficiency of data transmission and prolonging the network life.

Abstract: This template This paper investigates the optimal cluster flight orbit design issue for the fractionated spacecraft according to three main goals: keeping the cluster as stable as possible, preventing the collisions within the cluster, maintaining the inter-satellite distance within the maximum region. Firstly, the relative orbital elements are adopted to describe the relative motion. Then, the formation design requirements are formulated in terms of the relative orbital elements, the constrained optimization problem is solved using the hybrid particle swarm optimization algorithm integrated with sequential quadratic programming local search. The simulation results show that the hybrid PSO-SQP algorithm is effective.

Abstract: This paper puts forward a new algorithm based on RBF neural network to reconstruct three-dimensional temperature field.The algorithm uses three-dimension Discrete Cosine Transform on temperature field,and establishes a mapping relation between low order term coefficient vector and sound wave path average temperature vector,then implements the mapping relation using radical basis function neural network.Finally three-dimensional temperature field was reconstructed by using Inverse three-dimension Discrete Cosine Transform.Simulation results show that the algorithm features high precision.

Abstract: To verify the system software logic of a newly designed autonomous underwater vehicle and the hardware architecture, data interface and reliability of the intelligent control system, the semi physical simulation platform was established by combining physical simulation of decision layer with virtual simulation of perception and behavior layer. The hardware and software architecture of the simulation platform were explained in detail. The virtual simulations of motion, sensors and physical simulation of intelligent control system were described. Finally, the obstacle avoidance simulation and long voyage simulation tests were conducted, and the platform is important for the success of sea experiments.

Abstract: Localization is a fundamental and essential issue for wireless sensor networks (WSNs). In this paper, we present a range-free region localization (RFRL) algorithm for static WSNs, in which each unknown node collects the location information of anchors within its two-hop distance, and then some location information of its one-hop anchors and two-hop anchors are chosen to implement a grid-scan algorithm. Analysis and simulation results show that our algorithm outperforms the other Grid-Scan schemes even when the communication radius is irregular.